#ifndef STAN_MATH_PRIM_SCAL_META_MAX_SIZE_HPP
#define STAN_MATH_PRIM_SCAL_META_MAX_SIZE_HPP

#include <stan/math/prim/scal/meta/length.hpp>

namespace stan {

  template <typename T1, typename T2>
  size_t max_size(const T1& x1, const T2& x2) {
    size_t result = length(x1);
    result = result > length(x2) ? result : length(x2);
    return result;
  }

  template <typename T1, typename T2, typename T3>
  size_t max_size(const T1& x1, const T2& x2, const T3& x3) {
    size_t result = length(x1);
    result = result > length(x2) ? result : length(x2);
    result = result > length(x3) ? result : length(x3);
    return result;
  }

  template <typename T1, typename T2, typename T3, typename T4>
  size_t max_size(const T1& x1, const T2& x2, const T3& x3, const T4& x4) {
    size_t result = length(x1);
    result = result > length(x2) ? result : length(x2);
    result = result > length(x3) ? result : length(x3);
    result = result > length(x4) ? result : length(x4);
    return result;
  }

}
#endif

